率浦 的英文怎麼說

Under the incentive of the civil - market demanding such as laser material processing and the military - market demanding such as a new generation of laser weapon candidate and icf, diode - pumped solid laser ( dpsl ) develops rapidly worldwide. as an important application, diode - pumped intracavity - frequency - doubled laser is attached much importance in recent years, but there still remain many problems unresolved completely. in this paper, i have given some abecedarian study results on some of these problems theoretically and experimentally

因工業激光材料加工等民用市場的需求以及慣性約束聚變和作為新一代激光武器候選器件等軍方需求的推動，國際上高功率二極體泵浦固體激光器（ dpsl ）的研究進展迅速，作為dpsl的一個重要應用，內腔倍頻一直得到大家的重視，但仍有許多未徹底解決的問題和理論上的不完備之處，本論文擬對其中的一些問題作一初步的理論和實驗研究。

Along with developing of the commercial availability of high - power ingaas laser diode in the 1990s, the advantage of yb : yag suitable for the ld pumped high power solid - state lasers was realized

對ld泵浦的高功率yb : yag固體激光器的研究已成為當前熱點，並將其視為發展高效、高功率固體激光器的一個主要方向。

In order to obtain the maximum conversion efficiency we always hope the pump source is operated at the maximum level, thus to raise the input pump energy, we have to apply the galilean telescope to input the pump beam, but it will lead to the bad pump beam quality and the large output beam linewidth

為了獲得最大轉換效率總希望使泵浦源運轉在可達到的最高水平，因此不得不採用伽利略壓縮望遠鏡輸人泵浦光以提高輸人泵浦光的能量，但是這同時使泵浦光質量變壞，使得輸出線寬變大。

Purkinje fibers are driven ("over driven") by the sinus node at twice their intrinsic rate.

浦氏纖維是被較其本身頻率約高一倍的竇房結所驅動（「超速驅動」）。

The experiment of intracavity doubling of a 946 nm nd : yag laser with an lbo crystal has been done at room temperature. a continuous wave 473 nm laser is obtained with 235mw output power at a pump power of 20w. the laser beam quality of 473 nm is good as well

對腔內倍頻輸出473nm激光進行了初步的實驗研究，在泵浦功率為20w時， l獲得了光束質量較好的連續波形式的藍光激光輸出，其功率為200mw 。

We have firstly developed the all fiber femto - second laser, but its average output power is only tens of milliwatt. with the development of cladding pumped technology, it is the efficient way to amplifying the output power

在國內我們已經首先研製成功了全光纖飛秒激光器，但平均輸出功率只有幾十毫瓦，包層泵浦技術的成熟，無疑給其進一步放大功率提供了技術保障。

Ignored the amplified spontaneous emission ( ase ) and esa, rate equations and propagations equations for continuous wave er ~ ( 3 + ) / yb ~ ( 3 + ) co - doped phosphate glass waveguide laser were calculated using runge - kutta algorithm. propagation characteristics of signal and pump light in the waveguide were analyzed too

利用fd - bpm法，對在平板波導以及波導折射率為漸變折射率分佈的溝道波導和掩埋型波導內傳播的波長為980nm的泵浦光和1540nm的信號光的光場進行了模擬。

Presently, the development of ld pumped, watt - level, solid - state blue laser is not mature, thus the theoretical and experimental research is necessary. based on the present researches, some valuable results have been obtained

目前， ld泵浦的小功率473nm全固態藍光激光器已經基本成熟，但是在瓦級大功率方面發展還不成熟，尚需在理論和實驗上進行更進一步的研究。

Research for the relation between small signal gain coef ficient and pump - energy density of high - power off - axis two - pass amplificati on

離軸高功率雙程放大系統中小信號增益系數與泵浦能密度關系研究

Craig wilson could win out over andy phillips and aaron guiel, given his experience at first base, his success against left - handed pitching, and his status as an emergency third catcher

在威爾森、飛利浦先生及艾倫蓋爾中，威爾森可能會勝出，因為他可以守備一壘、對左投手打擊率較高還可以支援防守三壘。

Using double - clad fibers, an efficient coupling of a high - power pump source into a single - mode fiber core can be achieved

尤其是包層泵浦技術的應用，使高功率輸出的光纖激光器實現成為可能。

The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses, in which phase conjugate reflectivity as high as 21. 5 % was obtained. when sppc were operated in ce : batio3 with 532nm, 632. 8nm and 790nm cw lasers, the maximum sppc reflectivity of 54. 1 %, 88. 2 % and 80. 5 % were obtained, respectively. unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths, both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments

通過大量的實驗全面研究了ce ： batio _ 3自泵浦位相共軛特性：在低重復頻率（ 1hz ） 、 532nm調q激光泵浦時最高獲得了21 . 5的位相共軛反射率，而此前報道過的建立位相共軛脈沖光最低重復頻率是10hz ；實驗中發現在532nm 790nm波長范圍內，在不同的波長激光泵浦時，同時存在兩種自泵浦位相共軛機制：全內反射?四波混頻（ tir - fwm ）和受激背向散射?四波混頻（ spb - fwm ） ；在連續激光泵浦時，對532nm 、 632 . 8nm和790nm三種波長，最高分別獲得了54 . 1 、 88 . 2和80 . 5的位相共軛反射率；同時還研究了自泵浦位相共軛光的時間穩定性。

Abstract : in view of the crystal structure, this paper repo rts thecharacter of single crystal growth of germanate and the properties as me dium of laser crystal. the study and progress in germanate crystals used as widel y tunable laser crystal, self - doubling - frequency crystal and highly efficient and low pumping threshold laser crystal are introduced

文摘:從晶體結構上分析了鍺酸鹽的單晶生長和作為激光晶體基質的特點，並介紹了鍺酸鹽作為可調諧激光晶體，自倍頻晶體，高轉換效率和低泵浦閾值的激光晶體的研究及進展。

According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。

The thesis analyzed the present transferring status between pudong airport and shanghai " s incity. through forecasting the long - dated flux of pudong airport and the area near it and combining the planning scheme of shanghai urban rapid mass transit, the thesis learned the helpful experience of the traffic organization in typical airport abroad and used the scientific analyzing model of public traffic flux forecasting to put forward some reasonable suggestion of the bottleneck question between pudong airport and incity : the one is to use the present no. 2 subway as the future airtrain to take on the most part of the flux and meantime present the concept of feeder efficiency to quantitative analyze the choice of feeder station ; the other is to set up cat ( city air terminal ) to convenient the passenger to come airport rapidly and economically in order to lessen the pressure of the traffic and improve the whole service quantity of civil aviation transportation

本文分析了浦東機場與市內目前的換乘現狀，從預測浦東機場及緊鄰空港區域中遠期的客流量入手，結合上海市政府快速軌道交通的規劃方案，並且學習境外典型機場交通組織的有益經驗，利用規劃中的公交客流預測等科學分析模型，對浦東機場與市中心的軌道交通銜接提出了合理的建議：一是利用目前的地鐵二號線作為航空軌道共享線來承擔大部分進出空港的客流，並且給出了以接運效率最大化為目標函數的接運公交軌道站點比選模型；二是在市中心設立城市航站樓以方便旅客快速、經濟地到達機場，從而減少道路交通壓力，提高航空運輸的整體服務質量。

In the situation that the reflection loss of the duct inwall was not in considering, even condensed the pump beam 100 times, it could realize the output efficiency of more than 70 %, this was that the other coupling way hardly to accomplish

在不考慮內壁反射損耗的情況下，即使將泵浦光束縮束100倍，也能夠實現70 %以上的輸出效率，這是現有其他耦合方式難以實現的。

As a result, yb - doped crystals languished in the shadow of nd : yag and other laser media for several decades waiting for high - power spectrally bright pump sources

上世紀90年代以來，隨著ingaas大功率激光二極體的不斷發展， yb : yag晶體具備適合ld泵浦的優點重新被人們認識。

If we like to obtain the narrow linewidth parametric beam output, applying soft apertures to input pump beam is helpful, but it will also

如果想獲得窄線寬輸出，採用軟光圈直接輸入泵浦光將有助於壓縮輸出參量光的線寬，代價是轉換效率降低。

We firstly summarize the development of yb - doped fiber lasers, pumping methods and the applications of high - power fiber lasers. 2. considering the scattering loss, we deduce the relationships between laser performances of yb - doped double - clad fiber laser and parameters of laser cavity from the steady state rate equations, numerically analysis the changes of laser performances, such as laser power with the parameters of laser cavity, including output mirror reflectivity, optimum length of double clad fiber

研究主要內容包括如下幾個方面:一、首先對摻鐿光纖及摻鐿光纖激光器的發展狀況、包層泵浦技術和高功率光纖激光器的應用等進行了綜述;二、在前人對高功率雙包層光纖激光器的理論基礎上，在考慮了光纖散射損耗因子的情況對光纖激光器理論進行了推導，給出了準解析解，進一步完善了理論分析。

At first, modeling of these divvies by rate equations to obtain expressions for threshold and slope efficiency is given. on the case of this theory, the large numbers of literatures and datum are consulted, and the laser is home studied. through rationally selecting and improving the reflector surface, ensuring the beam quality, increasing farthest the absorption path, and improving effective pumping frequency ; through designing the water cooler of yag bar, the volume of laser is half the same internal and international production, and the output power is get to the extremum of the same international production

並在此基礎上查閱了大量文獻和資料，對該種激光器進行了深入的研究，通過對yag棒直徑的合理選取併合理地改進反射鏡面，從而既保證了光束質量又最大限度的增加了吸收長度，有效的提高了泵浦效率；在不影響泵浦的前提下，通過有效縮短yag棒的長度減小輸出損耗；對yag棒的水冷系統進行優化結構設計，使激光器體積減小到國外同類產品體積的一半，而輸出功率已達到國外同類產品的極限值。